Abstract:
Arsenic-binding proteins are under continuous research. Their identification and the elucidation of arsenic/ protein interaction mechanisms are important because the biological effects of these complexes may be related not only to arsenic but also to the arsenic/protein structure. Although many proteins bearing a CXXC motif have been found to bind arsenic in vivo, new tools are necessary to identify new arsenic targets and allow research on protein/ arsenic complexes. In this work, we analyzed the performance of the fluorescent compound APAO-FITC (synthesized from p-aminophenylarsenoxide, APAO, and fluorescein isothiocyanate, FITC) in arsenic/protein binding assays using thioredoxin 1 (Trx) as an arsenic-binding protein model. The Trx-APAO-FITC complex was studied through different spectroscopic techniques involving UV-Vis, fluorescence, atomic absorption, infrared and circular dichroism. Our results show that APAO-FITC binds efficiently and specifically to the Trx binding site, labeling the protein fluorescently, without altering its structure and activity. In summary, we were able to study a protein/ arsenic complex model, using APAO-FITC as a labeling probe. The use of APAO-FITC in the identification of different protein and cell targets, as well as in in vivo biodistribution studies, conformational studies of arsenicbinding proteins, and studies for the design of drug delivery systems for arsenic anti-cancer therapies, is highly promising. © Springer Science+Business Media, LLC 2012.
Registro:
Documento: |
Artículo
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Título: | An arsenic fluorescent compound as a novel probe to study arsenic-binding proteins |
Autor: | Femia, A.L.; Temprana, C.F.; Santos, J.; Carbajal, M.L.; Amor, M.S.; Grasselli, M.; Del Alonso, S.V. |
Filiación: | Laboratorio de Biomembranas, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Saenz Peña 352, Bernal, B1876BXD Buenos Aires, Argentina Laboratorio de Inmunología y Virología, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Saenz Peña 352, Bernal, B1876BXD Buenos Aires, Argentina Instituto de Bioquímica y Biofísica (IQUIFIB), Departamento de Química Biológica, Universidad de Buenos Aires, Buenos Aires, Argentina LaMaBio, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Saenz Peña 352, Bernal, B1876BXD Buenos Aires, Argentina
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Palabras clave: | Arsenic carcinogenesis; Circular dichroism; Conformational studies; Drug delivery systems; Thioredoxin; 4 aminophenylarsine oxide; arsenic; arsenic binding protein; binding protein; fluorescein isothiocyanate; fluorescent dye; thioredoxin 1; unclassified drug; article; atomic absorption; circular dichroism; enzyme activity; fluorescence; polyacrylamide gel electrophoresis; protein folding; protein interaction; protein structure; Arsenic; Arsenicals; Carrier Proteins; Fluorescein-5-isothiocyanate; Fluorescent Dyes; Kinetics; Models, Molecular; Protein Binding; Protein Conformation; Protein Unfolding; Spectrum Analysis; Temperature; Thioredoxins |
Año: | 2012
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Volumen: | 31
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Número: | 8
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Página de inicio: | 656
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Página de fin: | 666
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DOI: |
http://dx.doi.org/10.1007/s10930-012-9441-6 |
Título revista: | Protein Journal
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Título revista abreviado: | Protein J.
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ISSN: | 15723887
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CODEN: | PJROA
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CAS: | arsenic, 7440-38-2; fluorescein isothiocyanate, 25168-13-2, 27072-45-3, 3326-32-7; Arsenic, 7440-38-2; Arsenicals; Carrier Proteins; Fluorescein-5-isothiocyanate, 3326-32-7; Fluorescent Dyes; Thioredoxins, 52500-60-4; p-aminophenylarsine oxide
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15723887_v31_n8_p656_Femia |
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Citas:
---------- APA ----------
Femia, A.L., Temprana, C.F., Santos, J., Carbajal, M.L., Amor, M.S., Grasselli, M. & Del Alonso, S.V.
(2012)
. An arsenic fluorescent compound as a novel probe to study arsenic-binding proteins. Protein Journal, 31(8), 656-666.
http://dx.doi.org/10.1007/s10930-012-9441-6---------- CHICAGO ----------
Femia, A.L., Temprana, C.F., Santos, J., Carbajal, M.L., Amor, M.S., Grasselli, M., et al.
"An arsenic fluorescent compound as a novel probe to study arsenic-binding proteins"
. Protein Journal 31, no. 8
(2012) : 656-666.
http://dx.doi.org/10.1007/s10930-012-9441-6---------- MLA ----------
Femia, A.L., Temprana, C.F., Santos, J., Carbajal, M.L., Amor, M.S., Grasselli, M., et al.
"An arsenic fluorescent compound as a novel probe to study arsenic-binding proteins"
. Protein Journal, vol. 31, no. 8, 2012, pp. 656-666.
http://dx.doi.org/10.1007/s10930-012-9441-6---------- VANCOUVER ----------
Femia, A.L., Temprana, C.F., Santos, J., Carbajal, M.L., Amor, M.S., Grasselli, M., et al. An arsenic fluorescent compound as a novel probe to study arsenic-binding proteins. Protein J. 2012;31(8):656-666.
http://dx.doi.org/10.1007/s10930-012-9441-6